Tables 231-234 



TABLE 231. — Temperature Differences between I.T.S. and various Older Scales 



2 5 I 



The value used for g is the standard value, 980.665 cm. per sec. per sec. = 32.174 feet per sec. per sec. 



* The values thus marked vary directly with "g." 



t The values thus marked vary inversely with "g." For values of "g" see Tables 706-709. 



TABLE 233. — Value of the English and American Horsepower (746 watts) in Local Foot-pounds and Kilogram- 

 meters per Second at Various Altitudes and Latitudes 



TABLE 234. — Nonflammable Liquids for Cryostats 

 (Taken from Kanolt, Bur. Standards Sci. Paper, 520, 1926.) 



Liquid CCI4 CHCU 4* C 2 H 5 Br 32 39* No. 40 



Freezing point C C —23 —63 —81 —119 —139 —145 — 150± 



*Compositions: No. 4; CC1 4 , 49.4%; CHC1 3 , 50.6%. 



No. 32; CHCI3, 19-7%; C 2 H 5 Br, 44.9%; C 2 H 2 C1 2 , 13.8%; C 2 HC1 3 , 



21.6%. 

 No. 39; CHCU, 14-5%; C 2 H 6 Br, 33.4%; C 2 H 2 C1 2 , 10.4%; C 2 HC1 3 , 



16.4%; CH 2 C1 2 , 25.3%. 

 No.4o;CHCl 3 , 17.9%; C 2 H 6 C1, 9.3%; C 2 H 6 Br, 40.7%; C 2 H 2 C1 2 , 125%; 

 C 2 HC1 3 , 19.6%. 



* Because of volatility and oxidation of some, these liquids should be kept in well 

 stoppered bottles when not in use. 



Smithsonian Tables 



